“Mars has a diameter about as wide as the continent of Africa. Its overall size, or surface area, is about eight times less than Earth’s, but it has the same amount of dry land.”
jpl.nasa.gov

[NASA]“it has the same amount of dry land” therefor is Mars Pangaea

Earth Expands Video

“The largest of the volcanoes in the Tharsis Montes region, as well as all known volcanoes in the solar system, is Olympus Mons. Olympus Mons is a shield volcano 624 km (374 mi) in diameter (approximately the same size as the state of Arizona), 25 km (16 mi) high, and is rimmed by a 6 km (4 mi) high scarp. A caldera 80 km (50 mi) wide is located at the summit of Olympus Mons. To compare, the largest volcano on Earth is Mauna Loa. Mauna Loa is a shield volcano 10 km (6.3 mi) high and 120 km (75 mi) across. The volume of Olympus Mons is about 100 times larger than that of Mauna Loa.”
marsprogram.jpl.nasa.gov

Mars #7proto-earth 4 billion years old

“Many scientists consider Mars to be volcanically active, even if we have not observed an eruption. Basalt meteorites from Mars indicate that volcanism has occurred in the last 180 million years. Very few impact craters occur on the lava flows of Olympus Mons, suggesting that this volcano has probably erupted in the last few million years.”
solarsystem.nasa.gov
 

*Original Astronomical Planet Infowars Discovery

VIDEOS:WATER ON MARS

ANCIENT CAVES OF MARS

GEOLOGIC FEATURE CORRELATIONS